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Worksheets

Intra/Inter Forces

Total questions: 21

Worksheet time: 4hrs 30mins

Name
Class
Date
1.

Which of the following is an intramolecular force?

a)

hydrogen bonding

b)

covalent bonding

2.

Which intramolecular force has the greatest strength?

a)

ionic bond

b)

nonpolar covalent

c)

polar covalent

3.

Which of these is the weakest intermolecular force [IMF]?

a)

Dipole-dipole

b)

Hydrogen bonding

c)

London dispersion forces

4.

Which intermolecular force [IMF] do all molecules have?

a)

Dipole-dipole

b)

Hydrogen bonding

c)

London dispersion forces

5.

Which intermolecular force [IMF] requires hydrogen and one of the following: nitrogen, oxygen, fluorine?

a)

Dipole-dipole

b)

Hydrogen bonding

c)

London dispersion forces

6.

Which intermolecular force [IMF] is characterized by partial charges?

a)

Dipole-dipole forces

b)

Hydrogen bonding

c)

London dispersion forces

7.

Which intermolecular force [IMF] causes water to have an elevated boiling point?

a)

London dispersion forces

b)

dipole-dipole forces

c)

hydrogen bonding

8.

Which type of intermolecular force [IMF] does this molecular drawing best represent?

a)

dipole-dipole forces

b)

hydrogen bonding

c)

London dispersion forces

9.

Which of these molecules exhibits dipole-dipole forces? (Select ALL that apply.)

a)

SO₂

b)

F₂

c)

PCl₃

d)

CH₄

10.

Which of these molecules exhibit hydrogen bonding forces? (Select ALL that apply).

a)

a

b)

b

c)

c

d)

d

11.

Which of these molecules exhibit London dispersion forces? (Select ALL that apply.)

a)

a

b)

b

c)

c

d)

d

12.

Which of these molecules are polar? (Select ALL that apply.)

a)

SO₂

b)

F₂

c)

PCl₃

d)

CH₄

13.

What explains the very high melting and boiling point of water?

a)

Strong dipole-dipole bonds between water molecules

b)

Strong hydrogen bonds between water molecules

c)

Dispersion forces which are present in all molecules

d)

Asymmetrical shape of the polar bonds.

14.
All molecules have London forces between them, but dipole-dipole and hydrogen bonding are so much stronger that when they are present we can ignore London forces.  Which of these has ONLY London forces?
a)
I2
b)
NH3
c)
OCl2
d)
SH2
15.

Which substance would have the weakest intermolecular force [IMF] of attraction?

a)

CH4

b)

NaCl

c)

H2O

d)

MgF2

16.

Which substance has the weakest intermolecular forces [IMF]?

a)

Substance A, boiling point of 75 °C

b)

Substance C, boiling point of 25 °C

c)

Substance B, boiling point of 105 °C

d)

Substance d, boiling point of 45 °C

17.

Which of the following is an intramolecular force?

a)

hydrogen bonding

b)

covalent bonding

c)

dipole dipole

d)

dispersion

18.

Melting and boiling points depend on thermal energy and the strength of ________

a)

intramolecular forces

b)

intermolecular forces

c)

polar covalent bonds

d)

metallic bonds

19.

London dispersion forces are also known as

a)

dipole

b)

covalent

c)

Van der Waals forces

d)

dispersion forces

20.
London forces are stronger in heavier atoms or molecules, and weaker in lighter atoms or molecules.  Which of these has the strongest London forces?
a)
F2
b)
Br2
c)
I2
d)
Cl2
21.
In general, substances with stronger intermolecular forces have ___________  boiling points than those with weaker intermolecular forces
a)
higher
b)
lower